Fig. 6.

Photomicrographs of trough layering samples, all under crossed polars. a Sample 49,533 showing the equant and rounded shape of olivine (ol) surrounded by poikilitic clinopyroxene (cpx). Cumulus grains of Fe–Ti oxides (ox) have elongate interstitial extensions. Scale bar is 1 mm long. b Sample 49,533 showing granular microstructure in olivine-rich parts of the melanocratic layering. Note the small interstitial grain of plagioclase (plag—arrowed) and the interstitial patches of Fe–Ti oxide. Scale bar is 1 mm long. c Sample SK11-12a from Trough G, showing highly elongate clinopyroxene grains forming a foliation parallel to the modal layering. Scale bar is 1 mm long. d Sample SK11-12c from Trough G showing the leucocratic portion of the modal layer. Plagioclase grains are generally bounded by planar growth faces and has a low aspect ratio as viewed in thin section. Interstitial phases are quartz and an altered pyroxene (px). Scale bar is 1 mm long. e Sample SK11-12c from Trough G. This field of view of the leucocratic portion of the modal layer contains a highly elongate plagioclase grain which has been bent and deformed by dislocation creep. The other, more equant, plagioclase grains show no signs of deformation. Note the interstitial patches of altered pyroxene (px). Scale bar is 1 mm long. f Sample 48,969 showing interstitial quartz forming extensive patches in optical continuity. Note the irregular walls of the enclosing plagioclase and their compositional zoning, denoting simultaneous growth of plagioclase and quartz from an evolved Na-rich liquid in the interstitial spaces. Scale bar is 200 µm long